Join Date: Jun 2008
Location: Columbia, Missouri
I slipped a 409 four speed in the place of a 283 powerglide, and it was a fairly easy fit. I went with the correct 1962 409 radiator, the correct fan shroud and a new viscous fan blade. The dual quads fit well under the hood. I used an aftermarket air breather (less expensive).
Behind the engine, I went with a Lakewood scattershield, 11 inch clutch setup, and a Borg Warner T-10 four speed. Had to modify the driveshaft length to fit. Went with a stocker 3.36 posi out back. Choose a good clutch setup, the first one I dusted in maybe 5 minutes (lots of power!).
I now have some 9000 miles on her and she performs well. Go for it, but I'd keep the original 327 if you can (for some future owner?).
I installed new springs (I went with the HD wagon springs) all around and in my opinion she sits tooo high in the front. I used HEI and had no clearance issues.
I recall somewhere on the 348-409 web site there was a sticky that details how to make the swap from a V8 PG to the 409 with a four speed. Check that out!